Balorn:
Hm, don't they have to share the same power supply as the Arduino? One of my worries is that there'll be too much current drawn from the 9v battery I have powering that, but I'm pretty new to hooking up motors.
No, servos don't have to share the same power supply, but you do need to connect the Arduino ground to the servo power ground if the power supplies are different. As I said, depending on what else you are doing on the Arduino, you might be able to power 1 or 2 servos. However, it is generally a better idea to power the servos separately. One of the links I provided shows how to wire the servos with external power.